package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.Employee;
import com.itheima.reggie.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.*;
import javax.servlet.http.HttpServletRequest;
import java.time.LocalDateTime;

@Slf4j
@RestController
@RequestMapping("/employee")
public class EmployeeController {
    @Autowired
    private EmployeeService employeeService;


    /**
     * 员工登录
     * @param request
     * @param employee
     * @return
     */
    @PostMapping("/login")
    public R<Employee> login(HttpServletRequest request, @RequestBody Employee employee){

        //1.将页面提交的密码进行md5加密
        String password = employee.getPassword();
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        //2.根据页面提交的用户名进行查询
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();

        // employee为前端传入的数据封装而成的对象，Employee为sql语句的参数,代表后端
        queryWrapper.eq(Employee::getUsername,employee.getUsername());

        Employee emp = employeeService.getOne(queryWrapper);

        //3.如果没查到则返回登录失败
        if(emp == null){
            return R.error("登录失败");
        }

        //4.密码比对，如果不一致则返回登录失败结果
        if(!emp.getPassword().equals(password)){
            return R.error("登录失败");
        }

        //5.查看员工状态，如果为禁用状态，则返回员工已禁用结果
        if(emp.getStatus() == 0){
            return R.error("账号已禁用");
        }
        //登录成功，将员工id存入Session并返回登录成功结果
        request.getSession().setAttribute("employee",emp.getId());

        return R.success(emp);
    }

    //登出
    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request){
        request.getSession().removeAttribute("employee");
        return R.success("退出成功");
    }

    //新增员工
    @PostMapping
    public R<String> save(@RequestBody Employee employee){
        log.info("新增员工，员工信息:{}",employee.toString());

        //设置初始密码123456，需要进行md5加密处理
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));

        //下面可以注释掉了，因为配置了公共自动填充，不需要手动填写了
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());
//
//        //获取用户登录的id
//        Long empId = (Long) request.getSession().getAttribute("employee");
//        employee.setCreateUser(empId);
//        employee.setUpdateUser(empId);

        employeeService.save(employee);
        return R.success("新增员工成功");
    }

    /**
     *
     * @param page
     * @param pageSize
     * @param name
     * @return
     */

    //分页查询
    @GetMapping("/page")
    public R<Page> page(int page,int pageSize, String name){
        log.info("page = {},pagaSize={},name={}",page,pageSize,name);
        
        //构造分页构造器
        Page pageInfo = new Page(page, pageSize);

        //构造条件构造器
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper();

        //添加过滤条件
        queryWrapper.like(StringUtils.isNotEmpty(name),Employee::getName,name);
        //添加排序条件
        queryWrapper.orderByDesc(Employee::getUpdateTime);

        //执行查询
        employeeService.page(pageInfo,queryWrapper);
        return R.success(pageInfo);
    }

    // 修改员工信息
    @PutMapping
    public R<String> update(HttpServletRequest request,@RequestBody Employee employee){
        log.info(employee.toString());

        //下面可以注释掉了，因为配置了公共自动填充，不需要手动填写了
//        //获取用户登录的id
//        Long empId = (Long) request.getSession().getAttribute("employee");
//        //设置进行这一操作的用户的id
//        employee.setUpdateUser(empId);
//        //设置更新时间
//        employee.setUpdateTime(LocalDateTime.now());
        employeeService.updateById(employee);
        // 这里传入的employee实际上只有id,和status有值，其他值都是null，mp的updateById可以自动识别null，值为null的属性不会修改。
        //底层应该是在sql语句中用了if
        return R.success("员工状态更改完成");
    }

    // 根据员工id查询员工信息
    @GetMapping("/{id}")
    public R<Employee> getById(@PathVariable Long id){
        log.info("根据员工id查询员工信息");
        Employee employee = employeeService.getById(id);
        if(employee != null){
            return R.success(employee);
        }
        return R.error("未查询到此员工的信息");
    }



}
